Concept:The median can be determined graphically using the cumulative frequency curve, also known as an ogive.Explanation:1. An ogive is a graph of cumulative frequency against the upper class boundaries.2. To find the median, locate the point on the y-axis corresponding to half the total frequency, then draw a horizontal line to the ogive, and from that intersection drop a vertical line to the x-axis; the x-coordinate gives the median.Answer:A. Ogive